<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" >
        <title>双飞翼布局</title>
        <style>
            .left{
                width: 100px;
                height: 100px;
                background: red;
                float: left
            }
            .cont{
                height: 100px;
                background: yellow;
            }
            .right{
                width: 100px;
                height: 100px;
                float: right;
                background: blueviolet;
            }
        
        </style>
    </head>
    <body>
        <!-- 双飞翼布局,就是两边固定宽度,中间自适应 -->
        <div class="left">
            这是左边部分
        </div>
        <div class="right">
            这是右边
        </div>
        <div class="cont">
            这是内容部分
        </div>
    </body>
</html>